Just a few months ago my car only passed the yearly emissions test barely by extremely advancing the timing (I don't know how much since my mechanic kindly set it back to stock). Since the plug wires are only a few year old silicone units I figure they are still fine, I replaced the two year old autolites with Bosch Platinums, the coil is original, the distributer cap and rotor were very corroded so I cleaned them up with some very light sandpaper to remove the gobs of green on the contact points, the 02 sensors are also original I believe. Since the emissions test the car's performance has been dropping significantly. Now it is at a point where I have to keep it at 3.5K RPM and up just to not have the sputter near-powerless. This is basically the same way it acted when I bought it and when it had bad plugs and wires. I am guessing that the coil is fine and the 02 sensors and cap should be replaced (I think that when I sanded off the green I also sanded off some metal off of the contacts making it easier for the distributer to misfire).
Any suggestions? (what would me a good brand for a distributer cap and rotor (not honda)?, I can get a new KEM one for $12 but I don't want to buy it if this is a crappy brand)
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